`cppreference.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:bcef^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:3924^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.57.36^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.188.239^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`isabel.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2668^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c268^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`isabel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2268^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`isabel.ns.cloudflare.com`
		A	108.162.194.104^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	162.159.38.104^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	172.64.34.104^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
NS	`jake.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b7a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jake.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jake.ns.cloudflare.com`
		A	108.162.193.122^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
		A	172.64.33.122^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
		A	173.245.59.122^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
TXT	`v=spf1 ip4:195.201.94.168 ip6:2a01:4f8:1c1a:2e70::1 -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.57.36, 172.67.188.239
		IPv6 hints	2606:4700:3030::ac43:bcef, 2606:4700:3035::6815:3924
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=2, name=cloudflare-ech.com
SOA	`isabel.ns.cloudflare.com`dns@cloudflare.com serial=2406883232

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1783935882

rank #6186 globally
rank #3066 in the tld
WOT: SAFE (93/100)
📈 Tranco rank: #15,023

PTR for

137.6.80.208.in-addr.arpa

1.0.0.0.8.3.2.1.0.0.0.0.3.0.0.0.0.0.0.0.0.0.0.0.0.0.f.4.4.0.6.2.ip6.arpa

Subdomains

fr.cppreference.com

de.cppreference.com

ja.cppreference.com

tr.cppreference.com

ko.cppreference.com

zh.cppreference.com

www.cppreference.com

ar.cppreference.com

pt.cppreference.com

dev.cppreference.com

es.cppreference.com

mail.cppreference.com

ru.cppreference.com

upload.cppreference.com

en.cppreference.com

pl.cppreference.com

cs.cppreference.com

Same first word

cppreference.com

cppreference.cn

cppreference.net

cppreference.org

DNS History

17 records (6 active, 11 former)

●NSisabel.ns.cloudflare.com2026-04-16 → 2026-07-13 · 3 obs

○ 2026-04-10 17:33:28
● 2026-04-16 20:33:44
● 2026-07-13 09:59:12

●NSjake.ns.cloudflare.com2026-04-16 → 2026-07-13 · 3 obs

○ 2026-04-10 17:33:28
● 2026-04-16 20:33:44
● 2026-07-13 09:59:12

○NSns1.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-07-13 09:59:12

○NSns2.tigertech.biz2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-07-13 09:59:12

○NSns3.tigertech.org2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-07-13 09:59:12

○MXmx1.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-07-13 09:59:12

○MXmx2.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-07-13 09:59:12

○MXmx3.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-07-13 09:59:12

●A104.21.57.362026-04-18 → 2026-07-13 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-07-13 09:59:12

●A172.67.188.2392026-04-18 → 2026-07-13 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-07-13 09:59:12

○A208.80.6.1372026-03-04 → 2026-04-16 · 5 obs

○ 2020-03-16 04:51:20
● 2026-03-04 01:23:02
● 2026-04-16 20:33:44
○ 2026-04-18 09:44:36
○ 2026-07-13 09:59:12

○A2604:4f00::3:0:1238:12020-03-16 → 2026-04-16 · 5 obs

○ 2017-02-12 04:36:16
● 2020-03-16 04:51:20
● 2026-04-16 20:33:44
○ 2026-04-18 09:44:36
○ 2026-07-13 09:59:12

●A2606:4700:3030::ac43:bcef2026-04-18 → 2026-07-13 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-07-13 09:59:12

●A2606:4700:3035::6815:39242026-04-18 → 2026-07-13 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-07-13 09:59:12

○A74.114.88.1282015-07-12 → 2015-07-12 · 3 obs

● 2015-07-12 23:43:02
○ 2015-09-13 19:06:50
○ 2026-07-13 09:59:12

○A74.114.88.1392015-09-13 → 2017-02-12 · 5 obs

○ 2015-07-12 23:43:02
● 2015-09-13 19:06:50
● 2017-02-12 04:36:16
○ 2020-03-16 04:51:20
○ 2026-07-13 09:59:12

○A74.114.90.462020-03-16 → 2020-03-16 · 4 obs

○ 2017-02-12 04:36:16
● 2020-03-16 04:51:20
○ 2026-03-04 01:23:02
○ 2026-07-13 09:59:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
cppreference.com	jake.ns.cloudflare.com, isabel.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:173.245.59.122

NS records: jake.ns.cloudflare.com, isabel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cppreference.com (unsigned zone)

⏱️ Timing

Total: 174ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.188.239, 104.21.57.36`
AAAA	2	`2606:4700:3030::ac43:bcef, 2606:4700:3035::6815:3924`
NS	2	`isabel.ns.cloudflare.com, jake.ns.cloudflare.com`
TXT	1	`v=spf1 ip4:195.201.94.168 ip6:2a01:4f8:1`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`isabel.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (jake.ns.cloudflare.com, jake.ns.cloudflare.com, jake.ns.cloudflare.com...)

Analysis

Hierarchy

fr.cppreference.com, de.cppreference.com, ja.cppreference.com, tr.cppreference.com, ko.cppreference.com and a few other host names are all children of cppreference.com.

IP Addresses

cppreference.com directs to four IP numbers, which are 104.21.57.36, 172.67.188.239, 2606:4700:3030::ac43:bcef and 2606:4700:3035::6815:3924.

Two other host names, along with bactrim2018.icu, openaiapi.qingquan0703.workers.dev and inpas.com, also share IP numbers with cppreference.com.

Name Servers

Two name servers handle the delegation for cppreference.com: isabel.ns.cloudflare.com and jake.ns.cloudflare.com.

cppreference.com shares its NS records with other domains, for example solstar.ru, circles.ie, epicroasthouse.com and two others.

The name servers of cppreference.com overlap at least partially with those of other domains — among them ecofriend-group.com, delphinehomes.com, fracturesounds.com and two more.

The name servers kim.ns.cloudflare.com, rommy.ns.cloudflare.com and bruce.ns.cloudflare.com are commonly seen alongside these name servers.

DNS names with 6 IP addresses:

isabel.ns.cloudflare.com resolves to 108.162.194.104, 162.159.38.104 and 172.64.34.104 among others, with 3 other IP addresses in total.

jake.ns.cloudflare.com resolves to 108.162.193.122, 172.64.33.122 and 173.245.59.122 among others, with 3 other IP addresses in total.

cppreference.com - robtex.com